/*
 * Copyright 2003 Federal Chancellery Austria
 * MOA-SPSS has been developed in a cooperation between BRZ, the Federal
 * Chancellery Austria - ICT staff unit, and Graz University of Technology.
 *
 * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by
 * the European Commission - subsequent versions of the EUPL (the "Licence");
 * You may not use this work except in compliance with the Licence.
 * You may obtain a copy of the Licence at:
 * http://www.osor.eu/eupl/
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the Licence is distributed on an "AS IS" basis,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the Licence for the specific language governing permissions and
 * limitations under the Licence.
 *
 * This product combines work with different licenses. See the "NOTICE" text
 * file for details on the various modules and licenses.
 * The "NOTICE" text file is part of the distribution. Any derivative works
 * that you distribute must include a readable copy of the "NOTICE" text file.
 */

package at.gv.egovernment.moa.spss.server.iaik.xml;

import java.util.List;

import iaik.server.modules.xml.ExclusiveCanonicalization;

/**
 * An implementation of the <code>ExclusiveCanonicalization</code> type of
 * <code>Transformation</code>.
 *
 * @author Patrick Peck
 * @version $Id$
 */
public class ExclusiveCanonicalizationImpl
    extends TransformationImpl
    implements ExclusiveCanonicalization {

  /** The prefixes of the namespaces to treat according to canonical XML. */
  private List inclusiveNamespacePrefixes;

  /**
   * Create a new <code>ExclusiveCanonicalizationImpl</code> object.
   *
   * @param algorithmURI               The exclusive canonicalization algorithm
   *                                   URI.
   * @param inclusiveNamespacePrefixes The namespace prefixes to be processed
   *                                   according to canonical XML.
   */
  public ExclusiveCanonicalizationImpl(
      String algorithmURI,
      List inclusiveNamespacePrefixes) {
    setAlgorithmURI(algorithmURI);
    setInclusiveNamespacePrefixes(inclusiveNamespacePrefixes);
  }

  /**
   * Sets the namespace prefixes to be processed according to canonical XML.
   *
   * @param inclusiveNamespacePrefixes The prefixes of the namespaces to treat
   *                                   according to canonical XML.
   */
  protected void setInclusiveNamespacePrefixes(List inclusiveNamespacePrefixes) {
    this.inclusiveNamespacePrefixes = inclusiveNamespacePrefixes;
  }

  /**
   * @see iaik.server.modules.xml.ExclusiveCanonicalization#getInclusiveNamespacePrefixes()
   */
  @Override
  public List getInclusiveNamespacePrefixes() {
    return inclusiveNamespacePrefixes;
  }

  /**
   * Compare this object to another <code>CanonicalizationTransform</code>.
   *
   * @param other The object to compare this
   *              <code>ExclusiveCanonicalization</code> to.
   * @return <code>true</code>, if <code>other</code> is a
   *         <code>ExclusiveCanonicalization</code> and the algorithm URIs match,
   *         otherwise <code>false</code>.
   * @see java.lang.Object#equals(Object)
   */
  @Override
  public boolean equals(Object other) {
    if (other instanceof ExclusiveCanonicalization) {
      final ExclusiveCanonicalization eC14n =
          (ExclusiveCanonicalization) other;
      final boolean algURIEquals = getAlgorithmURI().equals(eC14n.getAlgorithmURI());
      final boolean inclNSPrefs =
          getInclusiveNamespacePrefixes() == null || getInclusiveNamespacePrefixes().isEmpty()
              ? eC14n.getInclusiveNamespacePrefixes() == null || eC14n.getInclusiveNamespacePrefixes()
                  .isEmpty()
              : getInclusiveNamespacePrefixes().equals(eC14n.getInclusiveNamespacePrefixes());
      return algURIEquals && inclNSPrefs;
    }
    return false;
  }

}